Attention, travelers: Your plans have changed

Closed: Arches National Park – Arches National Park is one of 401 National Park Service sites to close to visitors during the government shutdown.

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Closed: Yellowstone National Park – Wildlife will be roaming in visitor-free peace at Yellowstone National Park -- the fourth-most-visited national park in 2012, with 3.4 million visitors last year.

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Closed: Statue of Liberty – New York's Statue of Liberty, one of the United States' most recognizable symbols, is among the National Park Service sites affected by the federal government shutdown. This means Liberty Island, a national park, is closed to visitors too.

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Closed: Olympic National Park – Washington's Olympic National Park is famous for offering visitors ocean, mountains and rain forest in one park. Now that the U.S. government shutdown has come into effect, guests staying in campgrounds and on-site hotels will be given 48 hours to leave.

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Closed: Great Smoky Mountains park – Tennessee's Great Smoky Mountains National Park, a UNESCO World Heritage Site, is the nation's most visited with 9.7 million visitors last year. The shutdown comes as the park enters one of its busiest months of the year, according to visitor stats.

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Closed: Acadia National Park – Nearly 2.5 million people visited Maine's Acadia National Park last year. Mid-October is usually a busy time of year, with travelers coming in to check out the colorful fall leaves in the forests.

Operational: Airport security – Airport security personnel are considered essential and will continue working through the shutdown. So if you fly, there will be someone there to ask you to remove your shoes. (File photo)

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Operational: Air traffic control – Air traffic controllers, some safety inspectors and other essential employees will "continue working in order to maintain the safety of the national airspace system," said the Federal Aviation Administration. (File photo)

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Story highlights

All 401 U.S. National Park Service sites are set to close

Essential air traffic and security measures will be maintained

Passports and visas should continue to be processed

Some passport approvals could be impacted if offices are located in certain offices

Planning to travel in or to the United States and wondering if the U.S. government shutdown will hit your plans?

Well, you may need to tweak some sight-seeing portions of your itinerary. Never mind that visit to the Statue of Liberty in New York City. Forget visiting Independence Hall in Philadelphia. And that hiking adventure at Yellowstone National Park? It won't happen.

Congress, wrangling over spending and Obamacare, failed to renew government funds in time for the start of the new fiscal year on Tuesday, and many travelers -- both domestic and international visitors -- will quickly start feeling the impact of the shutdown.

While rail networks, essential air security and traffic control operations won't be impeded, travelers visiting the country's national parks and other government-run tourist attractions will find the gates shuttered and the doors locked.

All 401 National Park Service sites, which collectively average about 715,000 visitors per day in October, will be closed, according to a park service spokeswoman. (Guests staying in campgrounds and on-site hotels will be given 48 hours to leave.) The Smithsonian's 19 museums and galleries and the National Zoo will also turn visitors away.

Most immigration, border and customs employees are also considered essential personnel, which means passport controls at U.S. borders and points of entry like airports and cruise ports -- should be unaffected by the shutdown.

Other FAA projects, including facility security inspections, routine personnel security background investigations and development of the next generation of air traffic control technology, will be placed on hold.

What if you're waiting on a passport?

If you're waiting on a U.S. passport, how long that wait will last depends on where the passport agency is located. Passport services, because they are funded by other revenue, are generally "unaffected by a government shutdown," according to a State Department spokesperson.

There's just one possible catch: If the passport office is located within a government building that has been shut down, passport approvals may be affected.

If you need a visa

Because consular services at U.S. embassies and consulates around the world are largely funded by application fees, not annual appropriations, visa applications filed by foreigners wanting to enter the United States will continue to be processed, according to the State Department.

Overseas impact

Even those visitors trying to pay their respects at American military cemeteries located outside of the United States will feel the impact. The Normandy American Cemetery and 23 other overseas cemeteries operated by the American Battle Monuments Commission will be closed to the public for the duration of the shutdown, according to the commission's contingency plans.

"The Normandy American Cemetery presents a special case, as visitors have access to the cemetery via the unfenced approaches from the beach, according to the plan. "Visitors will be asked to leave, but confrontation will be avoided."

Congressional approval ratings hovered at historic lows. Republican and Democrats hurled insults at each other and among themselves. The political circus in Washington even made its way to "Saturday Night Live: -- in a sketch featuring Miley Cyrus, at that.